Stand on a stool tall enough to allow you to grab the pull up bar, at a ‘chin over the bar’ height.
Pull your shoulders back and down as tightly as possible.
Hold the bar with a slightly wider than shoulder-width overhand grip.
Breathe in and tighten your abdomen and walk off the stool to a hanging position.
Hang from the bar and try to keep your legs engaged by crossing them.
Start lowering yourself down in a controlled manner, while extending your arms.
Repeat the movement